Sound intensity, B, in decibels (d B) is defined as B = 10 log(), where I is the intensity of the sound %3D measured in watts per square metre (") and Io is 10-12 W, the threshold of hearing. m Tracey decided that she needed a new vehicle, as her old one was beginning to run poorly and make extremely loud noises while the engine ran. When she got her new vehicle, she measured the relative sound intensities of the vehicles running and found that her old vehicle was 23 times as intense as the sound of her new vehicle. If the decibel level of her new car is 79 d B, what is the decibel level of the old car? Show your full solution method on your work sheet. In the answer field, express your answer to the nearest decibel.

Sound intensity, B, in decibels (d B) is defined as B = 10 log(), where I is the intensity of the sound %3D measured in watts per square metre (") and Io is 10-12 W, the threshold of hearing. m Tracey decided that she needed a new vehicle, as her old one was beginning to run poorly and make extremely loud noises while the engine ran. When she got her new vehicle, she measured the relative sound intensities of the vehicles running and found that her old vehicle was 23 times as intense as the sound of her new vehicle. If the decibel level of her new car is 79 d B, what is the decibel level of the old car? Show your full solution method on your work sheet. In the answer field, express your answer to the nearest decibel.